added uptime

removed sleep as coreutils provides one


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@12367 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/bin/Jamfile

@@ -32,10 +32,10 @@ StdBinCommands
 	rescan.c
 	rmattr.cpp
 	safemode.c
-	sleep.cpp
 	sysinfo.c
 	unchop.c
 	unmount.c
+	uptime.cpp
 	waitfor.c
 #	whoami.c
 	: libroot.so ;

src/bin/uptime.cpp

@@ -0,0 +1,166 @@
+/************
+ ** 	from http://www.beatjapan.org/mirror/www.be.com/beware/Utilities/uptime.html
+ **	archive ftp://ftp.halcyon.com/pub/users/jrashmun/uptime.zip
+ **     License : Freeware
+*************/
+
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+
+#include <SupportDefs.h>
+#include <OS.h>
+
+void Usage( );
+
+void Usage( )
+{
+   printf( "\nUsage:  uptime [-u]\n" );
+   printf( "Prints the current date and time, as well\n" );
+   printf( "as the time elapsed since the system was started.\n" );
+   printf( "The optional argument omits the current date and time.\n\n" );
+}
+
+int main( int argc, char* argv[] )
+{
+   char            buf[255];
+   const char*     day_strings[] = { "day", "days" };
+   const char*     hour_strings[] = { "hour", "hours" };
+   const char*     minute_strings[] = { "minute", "minutes" };
+   const char*     day_string = 0;
+   const char*     hour_string = 0;
+   const char*     minute_string = 0;
+   int             print_uptime_only = 0;
+   time_t          current_time = 0;
+   const time_t    secs_per_day = 86400;
+   const time_t    secs_per_hour = 3600;
+   const time_t    secs_per_minute = 60;
+   time_t          uptime_days = 0;
+   time_t          uptime_hours = 0;
+   time_t          uptime_minutes = 0;
+   time_t          uptime_secs = 0;
+   const bigtime_t usecs_per_sec = 1000000L;
+   bigtime_t       uptime_usecs = 0;
+   bigtime_t       usecs_since_sec = 0;
+
+   if( argc > 2 )
+   {
+      Usage( );
+      return 1;
+   }
+
+   if( argc == 2 )
+   {
+      if( !strcmp( argv[1], "-u" ) )
+         print_uptime_only = 1;
+      else
+      {
+         Usage( );
+         return 2;
+      }
+   }
+
+   uptime_usecs = system_time( );
+
+   uptime_secs = uptime_usecs / usecs_per_sec;
+   usecs_since_sec = uptime_usecs % usecs_per_sec;
+   if( usecs_since_sec >= (usecs_per_sec / 2) )
+      uptime_secs++;
+
+   uptime_days = uptime_secs / secs_per_day;
+   uptime_hours = (uptime_secs % secs_per_day) / secs_per_hour;
+   uptime_minutes = (uptime_secs % secs_per_hour) / secs_per_minute;
+
+   current_time = time( 0 );
+
+   if( !print_uptime_only )
+   {
+      strcpy( buf, ctime( &current_time ) );
+
+      buf[strlen( buf ) - 1] = '\0';
+   }
+
+   day_string = (uptime_days == 1) ? day_strings[0] : day_strings[1];
+   hour_string = (uptime_hours == 1) ? hour_strings[0] : hour_strings[1];
+   minute_string = (uptime_minutes == 1) ? minute_strings[0] : minute_strings[1];
+
+   if( uptime_days && uptime_hours && uptime_minutes )
+   {
+      if( !print_uptime_only )
+         printf( "%s, up %ld %s, %ld %s, %ld %s\n", buf,
+                 uptime_days, day_string,
+                 uptime_hours, hour_string,
+                 uptime_minutes, minute_string );
+      else
+         printf( "up %ld %s, %ld %s, %ld %s\n",
+                 uptime_days, day_string,
+                 uptime_hours, hour_string,
+                 uptime_minutes, minute_string );
+   }
+   else if( !uptime_days )
+   {
+      if( uptime_hours && uptime_minutes )
+      {
+         if( !print_uptime_only )
+            printf( "%s, up %ld %s, %ld %s\n", buf,
+                    uptime_hours, hour_string,
+                    uptime_minutes, minute_string );
+         else
+            printf( "up %ld %s, %ld %s\n",
+                    uptime_hours, hour_string,
+                    uptime_minutes, minute_string );
+      }
+      else if( uptime_hours )
+      {
+         if( !print_uptime_only )
+            printf( "%s, up %ld %s\n", buf,
+                    uptime_hours, hour_string );
+         else
+            printf( "up %ld %s\n",
+                    uptime_hours, hour_string );
+      }
+      else
+      {
+         if( !print_uptime_only )
+            printf( "%s, up %ld %s\n", buf,
+                    uptime_minutes, minute_string );
+         else
+            printf( "up %ld %s\n",
+                    uptime_minutes, minute_string );
+      }
+   }
+   else if( uptime_hours )
+   {
+      if( !print_uptime_only )
+         printf( "%s, up %ld %s, %ld %s\n", buf,
+                 uptime_days, day_string,
+                 uptime_hours, hour_string );
+      else
+         printf( "up %ld %s, %ld %s\n",
+                 uptime_days, day_string,
+                 uptime_hours, hour_string );
+   }
+   else if( uptime_minutes )
+   {
+      if( !print_uptime_only )
+         printf( "%s, up %ld %s, %ld %s\n", buf,
+                 uptime_days, day_string,
+                 uptime_minutes, minute_string );
+      else
+         printf( "up %ld %s, %ld %s\n",
+                 uptime_days, day_string,
+                 uptime_minutes, minute_string );
+   }
+   else
+   {
+      if( !print_uptime_only )
+         printf( "%s, up %ld %s\n", buf,
+                 uptime_days, day_string );
+      else
+         printf( "up %ld %s\n",
+                 uptime_days, day_string );
+   }
+
+   return 0;
+}
+